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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/post-title` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the `core/post-title` block on the server.
  10   *
  11   * @since 6.3.0 Omitting the $post argument from the `get_the_title`.
  12   *
  13   * @param array    $attributes Block attributes.
  14   * @param string   $content    Block default content.
  15   * @param WP_Block $block      Block instance.
  16   *
  17   * @return string Returns the filtered post title for the current post wrapped inside "h1" tags.
  18   */
  19  function render_block_core_post_title( $attributes, $content, $block ) {
  20      if ( ! isset( $block->context['postId'] ) ) {
  21          return '';
  22      }
  23  
  24      /**
  25       * The `$post` argument is intentionally omitted so that changes are reflected when previewing a post.
  26       * See: https://github.com/WordPress/gutenberg/pull/37622#issuecomment-1000932816.
  27       */
  28      $title = get_the_title();
  29  
  30      if ( ! $title ) {
  31          return '';
  32      }
  33  
  34      $tag_name = 'h2';
  35      if ( isset( $attributes['level'] ) ) {
  36          $tag_name = 'h' . $attributes['level'];
  37      }
  38  
  39      if ( isset( $attributes['isLink'] ) && $attributes['isLink'] ) {
  40          $rel   = ! empty( $attributes['rel'] ) ? 'rel="' . esc_attr( $attributes['rel'] ) . '"' : '';
  41          $title = sprintf( '<a href="%1$s" target="%2$s" %3$s>%4$s</a>', esc_url( get_the_permalink( $block->context['postId'] ) ), esc_attr( $attributes['linkTarget'] ), $rel, $title );
  42      }
  43  
  44      $classes = array();
  45      if ( isset( $attributes['textAlign'] ) ) {
  46          $classes[] = 'has-text-align-' . $attributes['textAlign'];
  47      }
  48      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
  49          $classes[] = 'has-link-color';
  50      }
  51      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
  52  
  53      return sprintf(
  54          '<%1$s %2$s>%3$s</%1$s>',
  55          $tag_name,
  56          $wrapper_attributes,
  57          $title
  58      );
  59  }
  60  
  61  /**
  62   * Registers the `core/post-title` block on the server.
  63   */
  64  function register_block_core_post_title() {
  65      register_block_type_from_metadata(
  66          __DIR__ . '/post-title',
  67          array(
  68              'render_callback' => 'render_block_core_post_title',
  69          )
  70      );
  71  }
  72  add_action( 'init', 'register_block_core_post_title' );